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Forum Index : Windmills : blade wood type

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RifRaf

Newbie

Joined: 15/10/2006
Location: Australia
Posts: 32

Posted: 02:49am 12 Dec 2006

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Hi, what wood is best for making blades and available on east coast of NSW?

today at local place got some pine and blackbutt to try out. other choice was treated pine. intending to try make a single blade from pine to base the real ones on. also is 140mm x 45mm enough or do i need wider?

petanque don
Senior Member

Joined: 02/08/2006
Location: Australia
Posts: 212

Posted: 06:00am 14 Dec 2006

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An important issue is the grade of timber wood being a �natural� product there will be different quality�s depending on the variations in the grain and the number of knots in the wood.

How you value your time is a personal thing but I would suggest compared to the value of the time required to make the blades the price of the timber is only modest.

Also the potential for damage if a blade fails suddenly is large so use good quality timber.

martinjsto

Senior Member

Joined: 09/10/2007
Location: Australia
Posts: 149

Posted: 03:20pm 10 Oct 2007

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i have found the best wood is the prefab lamminated beams used in construction as they have the same density throught,
any thing else takes a lot of ballancing etc. i found my blades were hand carved and sanded nd worked out to 10 grams of each other when finnishd, on a blade 1.2 mts long * 150 wide 775 thick thats prety good as pine or jarrah were within 100grms and took some ballencing
the lam beams are realy strong and dont have grain, i have never had one fail
thanks all
martin

free power for all
McAlinden WA

petanque don
Senior Member

Joined: 02/08/2006
Location: Australia
Posts: 212

Posted: 05:37am 12 Oct 2007

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The green treated pine is treated with a toxic chemical (I think it is arsenic).

Don�t breath in the dust while working it.

Timber comes in many grades the extra good grades are used in air craft and are not cheap.

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